Prepare the vegetables:
Thinly slice or shred the cabbage, carrots, and bell pepper. Place all the vegetables into a large mixing bowl. Add the chopped cilantro, green onions, and sesame seeds (if using).
Make the dressing:
In a small bowl, whisk together soy sauce, rice vinegar, sesame oil, honey, ginger, garlic, and sriracha (if using) until well combined.
Toss the slaw:
Pour the dressing over the prepared vegetables. Toss well to ensure everything is evenly coated.
Chill and serve:
Refrigerate the slaw for at least 15–20 minutes before serving to let the flavors meld. Serve cold as a side dish or topping.